Preheat your oven to 400 F. Roast the galangal, kaffir lime and lemongrass for 5 minutes.
Add cumin seeds, coriander seeds and black peppercorns and roast again for 5 minutes.
Add the Thai basil, desiccated coconut and red pepper flakes and roast again for 5 minutes.
Let cool and transfer to a blender jar along with the remaining ingredients.
Blend until you get a slightly coarse mixture. Use immediately or store for later.
Notes
Make sure you let the spices cool down completely before you blend them. This will prevent clumping.
If you don't want to turn on the oven, you can also choose to dry roast the ingredients in a pan over medium heat, stirring continuously to ensure they don't burn.
Make sure you use the best quality and freshest ingredients here, especially the whole spices. This will ensure every bit of your seasoning packs in the maximum flavor punch.